Suncloud frames and lenses feature 8 base curvatures, enabling the frame and lenses to wrap on the wearer's face 8 base lenses provide added protection from annoying side glare and environmental elements such as wind, dust and particulate matter All Suncloud lenses are manufactured from optical grade Polycarbonate material; the results are a lightweight lens with high impact resistance for added protection Suncloud Polarized Optics comes with a Microfiber storage bag When not storing the sunglasses in the bag, it can be used to clean any smudges off your lenses